The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1998
Filed:
Apr. 12, 1996
Jean Etienne Gaudreau, Montreal, CA;
WavePhore, Inc., Phoenix, AZ (US);
Abstract
Embodiments of methods and apparatuses for removing ghosts from a signal such as a communications signal received over a channel where the output symbol pattern is used for selecting correction factors for correcting the received symbols. The correction factor is added to the sampled symbols and the sampled symbol is compared with a selected one of a plurality of thresholds based upon the closeness of the various thresholds to a sequence of the corrected symbol values. That comparison forms the basis for the next output symbol in the output sequence. Further, the selected correction factor is updated by taking the difference between the selected correction factor and an error measurement between the corrected sample value and the nominal value of the symbol times a damping factor. At various points in the sequence, the output is forced to an expected symbol sequence such as a clocking sequence used for clock recovery.